Webex Calling - ICE - Media Local - SRTP

[Faisal Saoud]

As I know the media is encrypted to the Webex calling by default. If the ICE succeeds, and the media remains local between two phones, will the media be encrypted by default? If not, how can I secure it locally

[Roger Kallberg]

From what I know the is no change to the media if ICE is used or not, other than the obvious when used, ie that media flows directly between the two entities in the call.

[Jonathan Schulenberg]

I agree with Roger but this is easy to PCAP and verify yourself.

[Faisal Saoud]

@Roger Kallberg @Jonathan Schulenberg , you mean the media remains secured if ICE succeeds. So Would you mind sharing a document stating this scenario?

[Roger Kallberg]

There is from what I know no document stating exactly that, but the port reference for Webex has a section about media that covers both with STUN, ie ICE and without. It states SRTP and to me that would reference that the media encryption stays the same for both scenarios. Port Reference Information for Webex Calling

But as @Jonathan Schulenberg wrote it would be quite easy to verify that yourself by taking a packet capture of a call where ICE/STUN is involved.